Title:
RESPIRATION DETECTION SYSTEM AND RESPIRATION DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/039601
Kind Code:
A1
Abstract:
The problem addressed is to improve the respiration detection accuracy. The respiration detection system includes a transmitting unit for transmitting radio waves to a plurality of locations including a location where a subject is, a receiving unit for receiving reflected waves reflected by the radio waves, a phase-fluctuation-calculating unit for calculating the phase fluctuation of the reflected waves, a generating unit for performing Fourier transformation on the phase fluctuations and generating a spectrogram showing the relationship between the time when the reflected waves were received and the frequency component included in the reflected waves, and a respiratory-rate-estimating unit for estimating the respiratory rate of the subject by outputting the probability that the subject breathes at a predetermined frequency on the basis of the spectrogram for each frequency and calculating the weighted average of the frequency using the probability as a weight.
Inventors:
OHTSUKI TOMOAKI (JP)
YAMAMOTO KOHEI (JP)
YAMAMOTO KOHEI (JP)
Application Number:
PCT/JP2020/031523
Publication Date:
March 04, 2021
Filing Date:
August 20, 2020
Export Citation:
Assignee:
UNIV KEIO (JP)
International Classes:
A61B5/11; A61B5/113
Foreign References:
| JP2017513656A | 2017-06-01 | |||
| JP2019512304A | 2019-05-16 | |||
| JP2013078413A | 2013-05-02 | |||
| EP3335632A1 | 2018-06-20 | |||
| JP2018161462A | 2018-10-18 | |||
| US20180260706A1 | 2018-09-13 | |||
| CN106901694A | 2017-06-30 | |||
| JP2001017403A | 2001-01-23 |
Other References:
KIM SEONG-HOON, GEEM ZONG WOO, HAN GI-TAE: "A Novel Human Respiration Pattern Recognition Using Signals of Ultra-Wideband Rader Sensor", SENSORS, vol. 19, no. 3340, 30 July 2019 (2019-07-30), pages 1 - 23, XP055797795
LIU, HAIPENG ET AL.: "Recent development of respiratory rate measurement technologies", PHYSIOL. MEAS., vol. 40, 2 August 2019 (2019-08-02), pages 1 - 28, XP055797800
LIU, HAIPENG ET AL.: "Recent development of respiratory rate measurement technologies", PHYSIOL. MEAS., vol. 40, 2 August 2019 (2019-08-02), pages 1 - 28, XP055797800
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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